Biology 1: 2-2

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A substance that forms as a result of a chemical reaction

product

substance that forms as the result of a chemical reaction

product

An enzyme is a

protein

A substance that exists before a chemical reaction occurs

reactant

starting material in a chemical reaction

reactant

In a chemical reaction the _____________ are the starting compounds used to create the products.

reactants

Activities of enzymes depend on

temperature, pH, ionic conditions

A chemical reaction that releases heat is an exothermic reaction.

true

Activation energy is the energy required to start a chemical reaction.

true

An enzyme speeds up a reaction by lowering the activation energy required.

true

Biochemical reactions take place inside of cells.

true

During a chemical reaction, some bonds break and new bonds form.

true

In a chemical reaction, the quantity of each element does not change.

true

Metabolism is the sum of all chemical reactions in an organism.

true

Most biochemical reactions need help, usually from an enzyme, to get started.

true

Understanding chemistry is needed to fully understand the processes within the cell.

true

________________ reactions take place inside the cells of living things.

biochemical

Reactions that take place inside cells are

biochemical reactions

In a chemical reaction _______________ are created and destroyed.

bonds

exothermic reaction in organisms

catabolic reaction

exothermic reactions in organisms

catabolic reaction

chemical reaction that absorbs energy

endothermic reaction

A protein that helps speed up a biochemical reaction

enzyme

Another name for biological catalyst could be a(n)

enzyme

protein that speeds up biochemical reactions

enzyme

_________________ make it easier for a chemical reaction to occur by lowering the activation energy.

enzymes

___________________ reactions are sometimes called catabolic reactions.

exothermic

What is the main difference between an endothermic reaction and exothermic reaction?

exothermic gives off energy and endothermic absorbs energy

Only some chemical reactions need energy to get started.

false

Exothermic reactions often release energy in the form of ___________ or light.

heat

Sum of all the biochemical reactions in an organism

metabolism

________________ is the sum of all biochemical reactions in an organism.

metabolism

sum of all the biochemical reactions in an organism

metabolism

endothermic reactions in organisms

anabolic reaction

The energy required to begin a chemical reaction is called _____________ energy.

activation

The "push" needed to start a chemical reaction is the

activation energy

The energy needed to start a chemical reaction

activation energy

energy needed to start a chemical reaction

activation energy

_____________ reactions create large molecules by combining smaller ones together. Such as building proteins from amino acids.

anabolic

A chemical reaction must follow the Law of the Conservation of ____________, meaning the total number of atoms before and after the reaction remains the same.

Mass

Represents a chemical reaction

chemical equation

A process that changes some chemical substance into others

chemical reaction

Matter is always conserved.

true

The joining of amino acids to form a protein is a(n)

anabolic reaction

endothermic reaction in organisms

anabolic reaction

chemical reaction that occurs inside the cells of living things

biochemical reaction

chemical reactions that take place in the cells of living things

biochemical reaction

chemical reaction that releases energy

exothermic reaction

A chemical reaction that releases energy is ________________, while one that absorbs energy is _____________.

exothermic, endothermic

A substance that forms as a result of a chemical reaction is called a reactant.

false

Anabolic reactions give off energy.

false

In a chemical reaction, the quantity of an element may change.

false

In chemical reaction, the number of atoms on one side of the arrow may differ from the number of atoms on the other side of the arrow.

false


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